Modification of LixNi1−yCoyO2 by applying a surface coating of MgO

Mg(OH)2 is coated on the surface of semi-crystalline LixNi1−yCoyO2. By further heating the coated sample, the surface is modified. This lowers the initial discharge capacity and improves the cycle-reversibility of a test lithium-ion cell, which was made with surface-modified LixNi1−yCoyO2 as the cathode material.